Flat-platen typewriter



f .H.` AfFoQTHoRAP FLAT PLATEN TYPEWRITERl Flled May 3, 1924 9 Sheets-Sheet 1' sm m Nov. 13, 1928 H. A. FcnoTi-{ORAP FLAT APLATEN- TYPEWRITEB ww. hm. .m Wm. ,N W, W L m w uw .v o ...G nl M N Nm. j. i \1l1 z U QW. o N P .WN Mm @wv Wmv IN w Q\\ Mw\\ El, @y m NN mK t w MN N WMU m. um .IW L.

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' H. A. FOOTHORAP FLAT PLATEN TYPEWRITER 9 Sheets-SheetA 4 Filed May 5, 1924 www Nov. 13, 192s.A

H. A. FOOTHORAP FLAT PLATEN TYPEWRITER 9 sheets-sheet 5 Filed May 5. 1924 lllllllirll llllll Il ...und

Nov. 13, 1928.

H. A. FOOTHORAP FLAT PLATEN TYPEWRITER Filed May 5, 1924 9 Sheets-Sheet 6 mw I 7/ .Wh @my WW. ma Mii... 14m/m um. mw. IIMR www.

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(Tchou/14111 9 Sheets-Sheet 8 H. A. FOOTHCQRAPFS"l FLAT PLATEN TYPEWRITER Filed May 1924 No.' '13, lags.

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Patented oven-13,: i

Umrans'raras sereni" 'oiFFic-E.

HARRY A. FOTHORAP, OIF HARRISBRG, EENNSYLVANIA, ASSIGNR T0 ELLIOTT? FLESHER(.OllflIIlA-rY,l A-CQRPORATION 0F DELANARE. I i

' FLAT-lineman rrriewnrrnn.

Application mea may s, 1924. seran no. 710,804.

This invention.relatestoy a portable mov# able platen for typewriting machines of the.

fiat platen type and toaJ platen equipment including means for retaining 'the work the platen and movements.'

One object of the invention is to .provide s in a light portable structure, a platen snpporting frame and a platen, the platen being capable of depression to release the Work for` adjustment and replacement and having two -bodily movements in its supporting frame,

one being a line space movement to accommodate the line arrangement ofthe work and the other being fa, free movement to present the work positionfor displacement, replacement oradjustment by the operator. j

Another object is to equip a platen of the character specified with means whereby the movement of the platento various positions 4 in the frame will effect the automatic con.`

trol of the work holding pr clamping eleL F ments.

Still another obJect of the inventlon 1s to provide for both automatic` linespacing of.

the platen through the return of they carriage to its normal writing position and manual line spacing of the platen independently o f the position of the carriage.

Still another. objectof ktheinvention is to provide a platen'of this general character with line space tabulating mechanism whereby when "the mechanism has. been 'once adjusted or seg-.up for a given-line arrangement of work, successive positions of` the-platen4 iny the line'space direction maybe quickly secured by the manipulation of aline'space tabulator key.

invention will hereinafter appear.

'In the: accompanying drawing'sa'f` Fig. 1 is afront elevation o a typewriting'machine embodying my invention.

Fig. 2 is a side elevation- 'thereof--; v

Still otherv features 1nd objects, of the.

Fig. B isa` planview of the platen shown l frame which is Lmovablenlongitudinally of I in its 1forward 'position and with the lrear F1g. ."6 iis ai similar viewA on somewhat en.

larged scale with certain of the parts omitted.

, of the key .utilized whollyA Fig. v7 is a'detail view of aportionof the line space mechanism.

Fig. is a'sectional View generally lar to Flg. 6 showing the line spacing mechanisni in a diii'erentperiod ofvoperation. F1g."9 1s an elevation ofthe line'space gressive'positions of the line sp indicated by means of full and-,dotted lines.

`Flg. l0 isa longitudinal sectiondesigned more particularlyA to show an operation of the platen depressing mechanism.

mechanism on an enlarged scale with proace toggle Fig. 11 is an elevation of the '1 -ear end of the platen.

Fig. 12 is a detailview of one of the platen depressing hails.v

Fig. 13 is a sectional .to show fthe construction and arrangement operated line space tabulator stops. -v M Fig.- '14 is a bottom plan view,- more particularly 'of the line vspace tabulating mechanlsm.

. Fig. 15 is .a'transverse section of a portion of the 'and Fig.

16 'isfa sideelevation of the platen frame. i

I t. inay lbefpremised that while the platen 'and platen equipment herein shown may be or in part in'any `relation calling for the support, movement and manipulation of orne or'more sheets, this specific 4embodiment ofthe invention has been de-v signed with reference 4to its incorporation in. what vis known as the Elliott-Fisher billing and bookkeeping machines.

-In machines of'this type the work elements. are supported ina flat spread out vcondition on a flat platen over which is AI nounted the printing 'mechanism 'which opplaten `trame and the main frame,

elevation designed crates vin :1 -downward direction.. This printf ing mechanism is vmounted on a movable carriage -f which travels transversely ofthe lplaten letter space the characters printed oneyby one: Ordinarily this movable carriage is iin turn' supported by a line space and relation of the machine elements just carriage and the substitution therefor' of aj riage 'described is the elimination of the movable line space-frame supporting the printing' platen which is movable `bodily relative to the transverse supporting frame for the car- Thus, the present arrangement is characterized by printing mechanism which lmoves. in a vletter spacing direction and a Work supporting platen. which moves in a line spacing direction. rWith this general understanding of the principal variation of this invention from the Well known relation of the primary elements of machines of this class we may proceed with the more specific disclosure. v

Referring first, more particularly, to Figs. 1, 2 and'3 the normally stationary unit of the portable structure maybe termed the main frame A on which is mounted a laterally movable carriage B and in which is mounted a longitudinal movable platen frame C.- rlhe carriage B, both in' construction and major equipment, is standard and includes printing mechanism embodying downwardly striking type bars and the usual printing keys 1 by means of which the type bars are actuated and the letter .space movements .of the carriage are controlled. This carriage is also equipped with the various auxiliaries usual in this type of machines, as for instance, ribbon mechanism, special keys for release, spacing, etc.

The frame A is composed primarilyof side bars 2 and 3 and front and rear carriage guide rails 4 and 5 rigid with the side bars. these transverse members being of suflicient stiffness to connect the-side bars in a rigid frame structure which preferably has four or more supports 6 provided with rubber or other cushioning' feet 7 to avoid injury tothe desk or other polished surface on which the frame may be supported. The

carriage guides 4 and 5 of the main frameof brackets 11 rising from the rear ends of the side bars 2 and 3 and serving as a means of attachment between said side bars and the rear transverse frame member to which they are or may be formed integral. The drum 9 is Aconnected to the carriage as usual b v a carriage propelling tape 12 tending constantly to pull the carriage toward the 4right but permitting its retraction toward the left upon the application of4 sufficient powerV to overcome the spring drum 9..

Brackets 11 also 'afford a convenient support for the feed rack 13 of the carriage feeding mechanism, having its upper edge toothed for engagement with the carriage ing devices on the carriage stops 15 adapted to be slid along the rack in the usual manner andretained in their adjusted positions to prevent movement of the carriage when the machine is moved and to limit the eX- tent vof movement of the carriage in use.

The platen frame or .carrier C in which the platen 16 is mounted, is, movable in the main frame,` as heretofore stated, in a'longitudinal or forward and back direction at right angles to the direction ofmovement ofthe carriage B. For this reason itv is' provided with ns or slides 17 extended along its opposite sides and received by longitudinal grooves or guideways 18 in the adjacent inner side faces of the side bars 2 and 3 of the main frame. y The platen frame or carrier C is preferably a light metal structure consisting of side walls 19 having inturned horizontal anges 20 and transverse members21 and 22 connecting the'side walls or members 19 at the front and rear ends thereof. The frame may be additionally necessary for the operator to bear down on the platen with suiiicient force toA overcome the 'springs25- It is contemplated, however, to -effect the automatic control of the vertical movement of the platen within its frame, and in the present embodiment of the invention this automatiecontrol'is governed by the position .of the platen and its frame with respect to the main supporting frame of the machine. That is to say, the arrangement such that when the platen moves 4to its eXtreme forward position, as shown in Fig. '10, an incident of this movement will be the automatic depression of the platen' to release the work sheets which have vbeen held between the platen and the paper clamps, and thus permit theirremoval, adjustmentor replacement as desired.

mechanism includes a transverse shaft 26 mounted in the platen frame' C and constituting the fulcrum of two platen depressing vyokes-27 provided at their rearends with rollers 28 and having at their front ends loose pivotal; connection, as indicated at 29, to bearing brackets 30 secured to the under side of the platen. The rollers 28 of the platen depressing yokes cooperate with The illustrated form of platen depressing a pairof depressing" cams 31 -iterminating in dwells 32 andextending rearwardly 'from arthird transverse bar l3.3 Of the .main frame A@ v It will be apparent from Figs, 1- and l0 that this ,transverse frame member 33 `isf droppeda suiicient distance below the plane of the side members 2 and 3 of the rvmain frame to accommodate the Adescribed platen depressingmechanism and various other elements `of the structure to whlch reference depressing yokes" 27 are out of cooperative: relation with the cams 31. In Fig. l the The operation'of the platen depressing mechanism will be clearly 'understood from a comparison of Figs. and 10. In Fig.V 5

the normal or paper clamping position of the platen-is shown. The rollers 28 of the platen platen has moved forward from the position one Aof several Vbearing1 shown in Fig. 5, thereby causing the rollers 28 to ride up the cams 31 thus depressing the platen andy resting finally 4upon` the dwells 32 and holding the-platen de ressedl as long as it remains in the advance position shown. As soon, however, asthe platen frame is moved back the rollers 28 will leave thedwells 32 and travellingdown the cams 31 will permit platen and clamp the' work securely. 1

the springs 25 to elevate the In addition to the side clamps=24 a hinged paper clamp 34 ismounted at the rear end of the platen and over-lies the edge theref,` as shown in Figs. v5 and 10, being.v normally heldjdown upon the laten by a spring 35 encircling the shaft 6 V`and secured at one end to the shaft andijiat its opposite end to by the 'rear end of t e platen frame and Y afording a bearing *for the shaft.4 `This swinging paper clamp `34, like the platen itself, is designed to be operated automatically and',; as will lbe seen by reference to Fig. 10,

the releasing of both-the platen-and theA clamp occur at `er about the same time, to wit, as the platen approaches lthe limit of its forward movement,since it is in this position of the platen that is is mostac'cessible for the manipulation ofthe work sheets thereon.

In order to swing the clamp 34 back and up a cam lever 38 is attached to one end-of the shaft 36and is 'normally'so disposed that a.

fixed clamp operating pin 39 projecting in wardly fromone side of the main .frameA will bejlocated in the path of the cam lever as the latter moves forward withthe platen.

' As the platen approaches the limit of its the pin 39 and 'is cammed up .swing the paper clamp 34 to its paper releasing position, as shown in Fig. 10. While forward movement the cam lever 38 rides on thereby to the clamp 34 may extendentirely across the rear end of the platenit is preferably ofsufiicient width to accommodate at one side thereof an adjustable work gauge 40.' This Work gauge 14() acts as an abutment for the rear members 3'( carried .edge of' he worksheetilwhen the latter lis laced in position-onthe depressed platen. t is carried at the inner end of an adjusts' 1 ment screw' 4l threaded for a portion fof .its length for engagement with a knurledfhead v42 and passed through a metal l late 43 from which. thebear'ing members 3 ofthe shaft-36 are, or may be, bent up.

"This plate 43 'sfbent into horizontal-po- ,sition -above 4the--workjgau e 40;- 11d-the this horizonta and against the gauge 40. Between the head 42 and the plate 43 is a sleeve 45 surrounding the screw 41'and-fliXed', if desired, tothepl'ate work-When slippedv to. place is passed'under` portion -44 of the plate43 4 3`tojelongate .the bearingaforded the screw.

in 'the plate'. -The'beiie 0f the sleeve 45' is work gauge-40 forward and back.

Interposed between the gauge 4 0 and the plain and thefadjstment screw is movable longitudinally to adjust the position vof the .plate43is al spring 46 which enclrcles the screw 41 and urges the to a positiondetermined y the adjustment -of the. knurled head 42 carried .by the screw and-abutted against the rear end of the. sleeve 45. Thusvfar we have seen how the general assemblage ofthe major units of the machine is accomplished, how the platen,` its supporting frame andthe work gauging and clamping means are assembled and how the main frame of the machine accomplished the vgauge 40 forward movement of the platen frame'within .the-

automatic release of thework by the depression of the platen relative to the lined paper clamps and by the swinging of the rear 'paper clamp away from the platen. 4

It is nowin orderl to explain invwh'at mani l' ner -themovement of the platen frame within the mainframe is accomplished and con'- tIOllBd; v

Mounted on the intermediate frame bar A3319i the main frame A is a spring drum 47 upon which is wound a platen propelling tape 48` ledsaround aV ide 49 at the under side .of the rear. end'ofgtlhe platen' frame and a terminal loop 50 attached to any havin oneo aseries of be referred to as t e platen propelling drum and it will beobvious that the series of pins 51 permit the ends of the tape to be secured at anyone of a series of pointsandaii'ord a convenient -means ofadjusting'the tensionv A propelling spring by the mere initial positioning of the work and the line vspacing movement to properly separate the printed lines is in a rearward direction and tends to wind the motor spring of the drum pins 51. Thedrum 47 will The line spacing movement of the platen frame and platen in a rearward direction is* accomplished by line spacing.. mechanism `which includes a ratchet rack 52 extending along the under side ofthe platen frame ajt the left hand side thereof (see Figs. 4, 8 and 9). lThe teeth of this rack may be spaced equidistantly, but in the illustrated structure the teeth are arranged in a front series 53 and a rear series 54, the teeth 54 being. spaced apart somewhat wider than. the teeth of the series 53, the purpose being to provide somewhat wider spacing for the lines of the heading, for instance of a bill or the like,-

than for `the lines of items' or other matter printed below the heading. y

Coactinglwith this rack is a spacing dog 55 pivoted at one end of an arm 56 extended from a rock shaft 57. At opposite sides of -the pivotal connection between the arm 56 and the dog 55 are lugs 58 connected by a spring 59 which constantly exerts a tendency to draw the dog 55 into angular' relation with the arm 56 which are, in eiiect, the 'ointed members of a toggle lspacing dog. n the normal angular relation of the dog 55 and the arm 56 the angular engaging end 60 of the dog engages a stop 61, as indicated by the dot and dash position of these parts in Fig. 9. lVhenthe arm'56 is swung up toward the full line position in Fig. 9 the toggle is straightened, the first part of this movement serving tomove the end of the dog into engagement with a tooth of the rack 52 and further movement causing the dog to move the rack and the platen the distance of one line space. During` this feedoriginal position. The result of this operation is that when the dog moves out of engagement with the rack its angular end will be engaged by thel pin 63 and compelled to remain out of engagement with the rack until it. passes under the pin 63 and resumes its position in' engagement with the pin 6l. Therefore, the spacing dog will remain in engagement with the rack during the feed motion but will remain out of engagement with the rack during retraction instead. of being dragged back over the teeth of the rack. The principal reason for this par'- ticular arrangement of the platen feeding mechanism, however, is to have the feeding mechanism normally entirely disconnected from the rack so that theplaten frame and platen may be freely moved independently of this feeding mechanism` as will be hereinafter described.

A convenient form of operating device for the feed dog includes an arm 64 extended 'I provide a holding, dog 68 pivoted at 69 and having a tail piece connected to a spring 71 secured to a fixed part 72. The spring 71'yieldingly retains the holding dog 68 in its engaging position but allows it toyield. when engaged by the inclined face of a rack tooth when t-he platenframe is moved rearwardly.

Obviously, in addition to the spacing or 'g'.feeding means and the holding means the praten control must include releasing means whereb the platen may be wholly released when esired and allowed to be shot forward .by the platen propelling drum, as for provision of an-accessible device for withdrawingv the holding` dog 68 from the rack to eifect the platen release. To this end the ,dog 68 is formed with a pendent hook -73 engaged by one end of an angular lever y74 pivoted atone end, as indicated at 75,

and connected at its elbow or angle ,with a link 76, the forward end of which is in turn connected with the end of an angular'v lever 77 fulcrumed at 78 and connected at an intermediate oint to the stem of a release key 79. y depressing the key 79 the lever 77 is swung downwardly imparting a similar motion to the lever 74 which by reason of its engagement with the hook 73 will withdraw the holding dog 68 from the rack 52 and thus release the'platen for forward movement.4

Under some conditions it is desirable that the release key be locked down when -depressed. This is accomplished by providing a release lock 8O in the form `of a lever urged bya springSl into engagement with a notch 82 in the stem of the release key 79 when said key is movedl clown far enough to bring the notch 82 opposite the lock. At the end of the release lock 80 is a finger piece 83 by means of which the lock may be withdrawn fnom the release key when deni'sm and to effect the restoration of the platen control. I t isv alsocontemplated -to eiiect the operation' of the release lock automatically to' permit the retraction ofthe. re-

lease key. This end is attained'by mounting a plunger 84: in theside member 2 with one end in engagement with the release lock 8O and its opposite end extended inwardly beyond the side face of the member 2 and into the path of movement of 'afcam 85 .on the side of the platen frame (see Fig.

pressed the platen is released-in the manner.

.described and the`release key is vlocked down bythe lock 80. -If the lock has not been withdrawn before the forward movement of the platen presents the cam 85 to the vplunger 84 said cam will move the plunger inwardly to disengage the lock 80 and allow the lease mechanism to return to its platen r the platen normal position andthus restoring to the controll of the holding dog.

'rigidly in Nextin order of description comes the line space tabulating Vmechanism .whereby `the platen may be arrested at selected points in its travel in one direction by the'interference l `by front-and rear retaining devices 90 and 91. At intervals along thebar 86 are located stationary line s ace tabulator stops 92 suitably formed to t the bar and held screws'93l o accommodate the screws 93 .the bar. 86 is formedV witha longitudinal 'series of openings 94'which may be grouped as shown along the line of a longitudinal slit 95 inthe bar. While the stops 92 may be of any desired form, they preferably'have at `the right hand side of the bar engaging faces 96 designed to be engaged'by movable line space tabulator stops 97 pivoted in a bracket 98 secured to a plate 99- extending between andv xed to the bar 26- and frame member .23 of the platenframe. The mov- -able stops' 97'are of bell-'crank form, as

shown in Fig. 13', one arm constituting the stop 97 andthe other arm 100 extending vertically from the fulcrum 101` for attachment.'

to the stems 102 of 'a series of four line space 103 to which is attached a spring 104 secured nto the bracket 98 and se'ving to hold the stops 97 in elevatedposition and againsta wall of the bracket 98. Thekeys a, b, c and d are exposed at theiront end of the platen frame, their stems being suitably guided in the latter. It will be noted by reference to Fig. 4; that the stops 97 are arranged in a rposition thereon by adjusting' series extending transversely of the platen and in a-plane beyond the right hand edge of the bar 86. This loca-testhe movable stops indifferent longitudinal planes with reference `to the platen travel so thatthe stops 92 are o'f different lengthsthe e ging faces vthereof will be located in tlij e planes of movement of different sto s v i:novable with 4the planten. Ubviously, therefore, the desired vp'c'psition of the platen may be selected by operating the appropriate line'space tabu,-

lator key. @,jb, c or ato depress the appropriate stop97 toits operative osition, and

by moving the platen rearwar ly until the appropriatexed and movable stops `come into --engagement tol arrest the platen at the selected point;v If the matter to be inserted at this pointief the Work 'sheet embraces more than asingle line the platen will bel fed .rearwardly biy the operation of the line spacing mechanismnntil it is desired to skipaportion of the work sheet before making the next entry. rlihis free movement of the platen will be effected by the manipulation of a line space tabulator key `as before;

The proper setting of the stops 92 is facilitated by a scale 105 on the bar 86 and a corresponding scale 106 extending longitudi-'- nally of the platen at 'one side thereof (see Fig. 10).

For the convenienceof the operator a copy holder 107 may ben carried 'bythe frame A which also, supports a letter space tabula-tor lbar 108 carrying adjustable stops 109 which coact with key operated tabulator stops mounted on the carriage inthe usual manner. Normallythe carriage B- occupies a position at the left hand end ofits travel and the platen occupies a forward position lwhich makes-its arefa` accessible for the reception of the work sheet or'sheets. In this for'- ward position the platen is depresseds'o that the work sheets thereon will Vunderlie f the paper clamps. By placing the finger on one of the line space tabulator keys one of the erative position and continued pressure on thepkey will move the platen back until are rested at that point at which it is desired tot begin the-makingof a record on the sheet. Incidental tol this kpositioning of the platen it will be automatically elevated against the iixed work clamps and the movable work clamp 3 4 will drop into place as the cam recedes from-the pin 39.` This rearward movement. of the platen will wind the spring motor 4 7 which will befu'rther wound as the platen is line spaced rearwardly by-.the line. spacing mechanism or shifted to successive rearwardpositions by the manipulation of the line "space tabulatoi` mechanism. When the record has been completed th'e operator depresses the platen release key Anl optional feature of they structure isthe .provision for effecting the automatic line' 110 movable tabulator stops isl moved to its'opspacing of the platen upon the retraction ot' the carriage, this end being readil attained -by the mere rearward extension ot the shaft 110 of the line space lever 66 and the attachment to the'rear end of the shaft of an automatic line space lever 111 which, upon the retraction of the carriage B, is engagedand swung by an actuated member 112 extended from the left hand side of the carriage (see Fig. 1). y A

- An additional feature of Jmy invention is the resilient downwardly bowed guards 113 and 114 which extend respectively between the guide rails 4 and 5 in the direction of` the line spacing movement of the platen. These guards are adapted'to exert a light pressure on the paper during such movement ofr the platen to smooth out any Wrinkles or buckles which may have developed therein.

Vhile the illustrated embodiment kof my invention is thought to be preferable, it is obvious that many variations and modifications of its various structural features may be eiected Without material departurejrom the spirit of the invention as deiined in the appended claims.

What I claim is:

1. The combination with amaln lframe, of a platen frame movable therein for lineV spacing, a platen mounted in the platen frame and movable to engage or release the work, line spacing mechanism for the platen frame, and automatic means for moving the platen through movement of the platen frame. Y

' 2. The combination with a main frame, of

a flat platen movable therein for line spac- 'ing and also movable vertically to engage and release the Work, meansfor retracting the platen, and means operative upon .the retraction of the platen to move said platen vertically.

3..'l`he combination With a main frame,l of a reciprocatoryplaten frame carried thereby, a platen movable in the platen frame to engage and lrelease lthe work, means for moving the platen frame in one direction, and means operated by much movement of the platen frame to move the platen in the platen frame.

.4. 'The combination with a main frame, of a platen frame movable therein, a platen movable in the platen frame and yieldingly sustained in one position, and means operated by the movement of the platen frame in the main frame to move the platen in the platen frame.

5. The combination With a main-frame, of aj -platen frame movable therein, a depressible platen mounted in the platen frame, a platen depressing cam carried by the main frame, and means carried by the platen frame `and coacting with the cam to depress the platen.

6. The combination with a main frame, of a platen frame movable therein, a yieldingly\ sustained deprcssible platen mounted in the platen frame, platen depressing means operated bythe relative movement of the main frame and the platen frame and including a pivoted member and a coacting cam. I

7. The combination with a main frame, of a platen frame movable therein, a yieldingly sustained depressible platen mounted in the platen frame, platen depressing means' operated Aby the relative movement of the main frame and the platen frame and including a pivoted member and a coacting cam, said pivoted member being mounted in the platen 'frame and said cam being supported by the main frame.

8. The -combination with a main frame, of a lplaten frame movable therein, a depressible flat platen mounted in the platen frame for edgevvise movement, and means operative, as theplaten iframe approaches one limit of its movement, to depress the platen.

9'. The combination with a main frame, of a platen frame movable therein, a depressible flat platen mounted in the platen frame for cdgevvise movement, and means operative to depress the platen when the platen frame approaches one limit of movement and also-operative to restore the platen to its elevated position as the platen frame recedes from said limit of movement.

10. `The y combination with a stationary mainframe, 'of a platen edgewise movable therein, a Worlren'gag'ing. member associatedwith the laten, and means for operating said wor 'engaging member by the movement of the platen.

11. The combination with a main frame, of a flat platenedgewise movable in the frame, a Work engaging member associatedA With the platen, and means operated by the movement of the platen in the main frame to move lthe work engaging member relative to the platen.

12. The combination with a main frame, a platen edgevvise movable therein, a movable Work clamp associated with the platen, andA clamp operating means controlled by the movement of the platen in the main frame.

13, rlhe combination With a main frame, of a platen edgewise movable therein, a movable W'ork clamp Aassociated with the platen, an operating cam, and means brought into coaction with the camby the movement of the platen in the frame to swing the Work clamp.

14. The combination with a line spacing rack, of a spacing dog movable to advance the rack, and a guide mounted to yield to permit the movement ot the spacing dog in one direction but'A retaining the dog out of engagement with `tl`ie`rack during the retractile movementof the dog.

15. The combination with a frame, of a platen in such direction, a release key operative to release the laten from the holding dog, means for lodging the release key in its operated position, and automatic means for unlockingthe release key in one position of the platen. f '1" A '17. The combination with a movable flat' platen, means for moving said platen in one direction, -a holding dog for the" platen means for lockingthe holding dog out' ot action, and meansmovable with'the platen for causing the holding dog to-be restored to operative position.

18. The combination With a-movable flat platen,'of a holding dog therefor, a key,..fo'r operating the holding dog, a lock for said key, and a cam movable with the platen to operate said lock. 4

1 19.' The combination with a main frame, of a carriage movable thereon, a nat platen movablein the frame, and platen moving meansoperated'by the carriage. Y

20. The combination With'a maini frame,

of. a platen movable therein in one direction, a carnage movable' 1n another directlon,` and a 'line spacing vmechanism operative to line space the platen and controlledv by vthe carri'age..v

21. The combination with a-main frame,

g of a' platen and a carriage carried by the' main frame and movable in different directions, line spacing mechanism for the' platen,` and both manual and carriage operated means for operating the line spacing mechamsm.

22. .The-combination with a main frame, of a latplaten movable therein, and a tabulat-ing mechanismfor arresting the platen in predetermined positions. Y

23. The combination with a main, frame, of a Hat platen movable therein, and 'a tabuplating mechanism including" interfering stops and rcontrolling keys.

. 2 4. The combination with a main frame, of a movable flat platen, line space tabulating mechanism including stops carried'by the frameand platen respectively,l and a key for moving one of said'stops into interferingrelation with another. v

25.' The combination with a main frame, of a fla-t platen movable therein, and a line space tabulating mechanism including a series-of key operated stops land a coacting series of stops.

' 26. The combination yvv'ith a main frame; of a fiat platen movabletherein, and a line space tabula'ting mechanism including a series of keyoperated'stops and a coactingr vseries of stops independently settable at va'- rious'points in the direction of the-platen travel.

27. The combination with a main frame,

of a fiat platen mounted to 7travel therein, a key operated stop movable with the platen,

.and al coacting stop carried by the frame.

The combination With a trame'and a movable flat platen, of tabulating mechanism includinga series of keys and key opcoacting stops carried bythe frame.

.29. VThe combination-with a frame and a astopbar mounted on the frame, and a stop 4erated stops movable with vthe platen, and i adjustable on the stop bar and arranged to coact with the key operated stop.

30. The lcombination with a main frame, of' a flat platen 'mounted to travel therein,

line space `tabulating mechanism for the.

platen, said mechanism including a series ot key operated-stops movable Withthe platen,

a stop bar carried .by the frame, and av se-v ries of independently adjustable stops carried .by thestop bar and arranged to co `operate With the key operated stops to arrest the platen in successive positions.- 31. The vcombination with a main frame, of a fiat platen mounted to travel therein, and tabulating mechanism including coacting stops and a key, said key being mounted on the frontend of the' platen `to facilitate both the operation of 'a .stop and the movement oi. the platen.

'3 2. The combination with a main frame, of a movable platen, keys disposed alongfthc front end of the platen and `movable in a rearward direction to move -the platen, and mechanism arranged to arrest'the platen and controlled by the keys.

33. The combination with a main frame and a movable Hat platen, of a series of keys each movable in the direction of the line space movement of the platen, and stop mechanism arranged to arrest the movement of the carriage and including stops controlled by the keys.

34E. The combination with a main frame,

vot' a flat platen movable therein, printing mechanism adapt-ed to produce a printed record on the Work sheet carried by the of a platen movable therein, printing .mech-- anism movable on the frame, tabulating mechanism for the platen, and tabulating mechanism for the printing mechan'isni. n 36. The combination with a main\frame,

' of a movable liat platen and movable printing mechanism both carried by the main frame, letter space tabulating meansffor the printing mechanism, and line space tabulating mechanism for the platen.-

'of a flat platen movable therein, tabulating mechanism including keys whereby the tabou` lating mechanism is made operative and the -platen is moved in one direction, and a -motor for retracting the platen in the oppo- K site direction.

40. The combination with a main frame, of a platen frame movable therein for line spacing, a depressible platen mounted' in the platen frame, and means whereby themove- 'ment of the platen frame in4 the main frame Will cause, the platen to be depressed' from its nor'mal Writing plane.

41. The Combination With amain frame,

of a-platen frame movable therein for line spacing, a platen mounted in the platen frame and movable therein toward and away from the Writing plane, and means brought into action by the movement of the platen frame in the main rameto cause the platen to move inthe platen frame.

p 42. The combination With a main frame, of a platen frame movable therein,- -a depressible flat platen mounted in the platen frame and normally located inthe Writing plane, and means brought into action by the movement of the platen frame in the main frame to cause the platen to be depressed when the platen frame approaches one limit of its movement and to cause the platen to be restored to the Writing plane when the platen recedes from said limit of movement.

In testimony whereof I hereunto affix my signature.

HARRY A. FOOTHORAP. 

